The seller says it was Eley 22LR subsonic Hollow Points. The 300 plus rounds of unused 22LR ammunition at WHF was Eley 22LR subsonic Hollow Points. Fletcher said the spent ammunition was he same.
You have no evidence to refute any of this- just unsupported allegations that do not make sense.
(1)
http://en.wikipedia.org/wiki/.22_Long_Rifle#Cartridge_lengthCartridge lengthA .22 short, .22 LR, .22 Winchester Magnum, and a .22 Hornet
The .22 LR uses a straight-walled case. Depending upon the type and the feed mechanism employed, a firearm which is chambered for .22 LR may also be able to safely chamber and fire the following shorter rimfire cartridges:
.22 BB, in cap, short, or long lengths
.22 CB, in cap, short, long, and long rifle lengths
.22 short
.22 long
The .22 long rifle may also be used in firearms chambered for the obsolete .22 Extra Long.